Ma Jun, Yang Wan-Min, Li Jia-Wei, Wang Miao, Chen Sen-Lin. The effects of magnetization methods with additional permanent magnet on the magnetic field distribution and levitation force of single domain GdBCO bulk superconductorJ. Acta Physica Sinica, 2012, 61(13): 137401. DOI: 10.7498/aps.61.137401